Main switch with single-phase insulation structure

Abstract

The utility model discloses a main switch with a single-phase insulation structure. The main switch comprises a circuit breaker switch and an isolation switch, the circuit breaker switch is arranged above the isolation switch and comprises a pole, a one-way insulation mounting structure and a circuit break transmission structure; the upper end of the pole is connected with the circuit breaking transmission structure, and the lower end of the pole extends to the upper part of the isolating switch; the one-way insulation installation structure comprises an insulation bottom plate, an insulation middle plate, a top plate and a supporting rod. The insulation bottom plate, the insulation middle plate and the top plate are sequentially arranged in parallel from bottom to top. The number of the supporting rods is two, one supporting rod is vertically fixed between the insulating bottom plate and the insulating middle plate, and the other supporting rod is vertically fixed between the insulating middle plate and the top plate. The central positions of the insulation bottom plate, the insulation middle plate and the top plate are respectively provided with an avoiding hole used for installing a pole. The main switch adopts a one-way insulation structure to replace a traditional clamping plate type structure, interphase short circuit is effectively prevented, and the reliability of equipment operation is greatly improved.

Description

Technical Field

[0001] The utility model relates to a power distribution switch, in particular to a main switch with a single-phase insulation structure. Background Art

[0002] Air insulated ring main unit is an electrical device consisting of a metal shell that forms a closed cabinet or an assembled interval ring main unit. Its core parts use load switches, disconnectors, and circuit breakers. It has the advantages of simple structure, good insulation performance, and environmental protection. It is widely used in distribution stations and box-type substations in urban residential areas, high-rise buildings, large public buildings, factories and enterprises, and other load centers.

[0003] Existing circuit breakers and isolating / earthing switches generally adopt a clamping plate installation structure, which is prone to phase short circuits and has low reliability. Utility Model Content

[0004] The purpose of the utility model is to overcome the above-mentioned problems and provide a single-phase insulation structure main switch, which adopts a unidirectional insulation structure instead of a traditional clamping structure, effectively preventing the occurrence of phase-to-phase short circuit and greatly improving the reliability of equipment operation.

[0005] The purpose of the utility model is achieved through the following technical solutions:

[0006] A single-phase insulation structure main switch, including a circuit breaker switch and an isolating switch;

[0007] The circuit breaker switch is arranged above the isolating switch, and the circuit breaker switch includes a pole, a one-way insulating mounting structure and a circuit breaker transmission structure; the upper end of the pole is connected to the circuit breaker transmission structure, and the lower end of the pole extends to the top of the isolating switch; the one-way insulating mounting structure includes an insulating bottom plate, an insulating middle plate, a top plate and a support rod, and the insulating bottom plate, the insulating middle plate and the top plate are arranged in parallel from bottom to top; the support rod is provided with two groups, one group is vertically fixed between the insulating bottom plate and the insulating middle plate, and the other group is vertically fixed between the insulating middle plate and the top plate; the central positions of the insulating bottom plate, the insulating middle plate and the top plate are all provided with avoidance holes for installing the pole.

[0008] A preferred embodiment of the utility model, wherein the pole includes an isolating static contact, a vacuum arc extinguishing chamber, a flexible connection and an insulating pull rod; the isolating static contact, the vacuum arc extinguishing chamber, the flexible connection and the insulating pull rod are fixedly connected end to end from bottom to top in sequence; the top end of the insulating pull rod is connected to the circuit breaker transmission structure.

[0009] In a preferred solution of the utility model, the lower part of the insulating bottom plate is connected to the first insulating support side plate through an insulating fixing plate, and the first insulating support side plate is fixedly connected to the side wall of the cabinet.

[0010] In a preferred solution of the utility model, the top plate is fixedly connected to the side wall of the cabinet.

[0011] In a preferred embodiment of the present invention, each group of support rods is provided with four support rods which are distributed in a rectangular shape, so that balanced and stable support can be provided.

[0012] A preferred solution of the utility model, wherein the circuit breaker transmission structure includes a circuit breaker transmission shaft, an eccentric transmission member and a connecting rod structure; the circuit breaker transmission shaft is rotatably connected to the top plate through a fixed bracket, and the circuit breaker transmission shaft is connected to the circuit breaker operating device through the connecting rod structure; the eccentric transmission member is fixedly arranged on the circuit breaker transmission shaft, and an arc-shaped transmission hole is provided on the eccentric transmission member, and the distances from the two ends of the arc-shaped transmission hole to the axis of the circuit breaker transmission shaft are unequal; the top end of the insulating pull rod of the pole can be movably connected to the arc-shaped transmission hole. Through the above structure, as the circuit breaker transmission shaft rotates forward and reversely, the insulating pull rod can be driven to rise or fall, so as to realize the opening or closing of the circuit breaker.

[0013] A preferred embodiment of the utility model, wherein the isolating switch includes an isolating knife switch, a knife switch mounting structure and an isolating transmission structure; the knife switch mounting structure includes a second insulating support side plate, an insulator and a mounting seat, the second insulating support side plate is fixedly arranged in the cabinet; the insulator is fixedly arranged on the second insulating support side plate; the mounting seat is fixedly arranged on the insulator; one end of the isolating knife switch is hinged on the mounting seat.

[0014] Furthermore, the isolation transmission structure includes an isolation transmission shaft and a swing assembly, the isolation transmission shaft is rotatably connected in the cabinet and connected to the isolation power mechanism; the swing assembly includes a first swing arm and a second swing arm, one end of the first swing arm is fixedly connected to the isolation transmission shaft, and both ends of the second swing arm are respectively hinged on the other end of the first swing arm and the isolation knife switch.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The single-phase insulation structure main switch of the utility model adopts a unidirectional insulation structure instead of a traditional clamping plate structure, which effectively prevents the occurrence of interphase short circuit and greatly improves the reliability of equipment operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of a single-phase insulation structure main switch of the utility model.

[0018] Figure 2 The utility model is a side view of a single-phase insulation structure main switch with one side wall of the cabinet hidden.

[0019] Figure 3 for Figure 2 Magnified view of the X in . DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the technical solution of the utility model, the utility model is further described below in conjunction with embodiments and drawings, but the implementation methods of the utility model are not limited thereto.

[0021] See also Figure 1-2 The single-phase insulating structure main switch of this embodiment includes a circuit breaker switch and an isolating switch; the circuit breaker switch is arranged above the isolating switch, and the circuit breaker switch includes a pole, a one-way insulating mounting structure and a circuit breaker transmission structure; the upper end of the pole is connected to the circuit breaker transmission structure, and the lower end of the pole extends to the top of the isolating switch; wherein, the pole includes an isolating static contact 1, a vacuum arc extinguishing chamber 2, a flexible connection 3 and an insulating pull rod 4; the isolating static contact 1, the vacuum arc extinguishing chamber 2, the flexible connection 3 and the insulating pull rod 4 are fixedly connected end to end from bottom to top in sequence; the top end of the insulating pull rod 4 is connected to the circuit breaker transmission structure.

[0022] See also Figure 1-2 The one-way insulating installation structure includes an insulating bottom plate 5, an insulating middle plate 6, a top plate 7 and a support rod 8, wherein the insulating bottom plate 5, the insulating middle plate 6 and the top plate 7 are arranged in parallel from bottom to top; the support rod 8 is provided with two groups, one group of which is vertically fixed between the insulating bottom plate 5 and the insulating middle plate 6, and the other group of which is vertically fixed between the insulating middle plate 6 and the top plate 7; the central positions of the insulating bottom plate 5, the insulating middle plate 6 and the top plate 7 are all provided with avoidance holes for installing poles.

[0023] Furthermore, the lower part of the insulating bottom plate 5 is connected to the first insulating support side plate 9 via an insulating fixing plate, and the first insulating support side plate 9 is fixedly connected to the side wall of the cabinet 10 .

[0024] Furthermore, the top plate 7 is fixedly connected to the side wall of the cabinet 10 .

[0025] Furthermore, each group of support rods 8 is provided with four support rods 8 and are distributed in a rectangular shape, which can provide balanced and stable support.

[0026] See also Figure 1-3The circuit breaker transmission structure includes a circuit breaker transmission shaft 11, an eccentric transmission member 12 and a connecting rod structure 13; the circuit breaker transmission shaft 11 is rotatably connected to the top plate 7 through a fixed bracket, and the circuit breaker transmission shaft 11 is connected to the circuit breaker operating device through the connecting rod structure 13; the eccentric transmission member 12 is fixedly arranged on the circuit breaker transmission shaft 11, and an arc-shaped transmission hole 12-1 is provided on the eccentric transmission member 12, and the distances from the two ends of the arc-shaped transmission hole 12-1 to the axis of the circuit breaker transmission shaft 11 are not equal; the top end of the insulating pull rod 4 of the pole can be movably connected to the arc-shaped transmission hole 12-1. Through the above structure, as the circuit breaker transmission shaft 11 rotates forward and reverse, the insulating pull rod 4 can be driven to rise or fall to realize the opening or closing of the circuit breaker.

[0027] See also Figure 1-3 The isolating switch includes an isolating knife switch 14, a knife switch mounting structure and an isolating transmission structure; the knife switch mounting structure includes a second insulating support side plate 15, an insulator 16 and a mounting seat 17, the second insulating support side plate 15 is fixedly arranged in the cabinet 10; the insulator 16 is fixedly arranged on the second insulating support side plate 15; the mounting seat 17 is fixedly arranged on the insulator 16; one end of the isolating knife switch 14 is hinged on the mounting seat 17.

[0028] Furthermore, the isolation transmission structure includes an isolation transmission shaft 18 and a swing assembly, wherein the isolation transmission shaft 18 is rotatably connected in the cabinet 10 and is connected to the isolation power mechanism; the swing assembly includes a first rocker arm 19 and a second rocker arm 20, wherein one end of the first rocker arm 19 is fixedly connected to the isolation transmission shaft 18, and both ends of the second rocker arm 20 are respectively hinged to the other end of the first rocker arm 19 and the isolation knife switch 14.

[0029] The above is a preferred implementation mode of the present invention, but the implementation mode of the present invention is not limited by the above content. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A single-phase insulated main switch, comprising a circuit breaker switch and an isolating switch; characterized in that: The circuit breaker switch is arranged above the isolating switch, and the circuit breaker switch includes a pole, a one-way insulating mounting structure and a circuit breaker transmission structure; the upper end of the pole is connected to the circuit breaker transmission structure, and the lower end of the pole extends to the top of the isolating switch; the one-way insulating mounting structure includes an insulating bottom plate, an insulating middle plate, a top plate and a support rod, and the insulating bottom plate, the insulating middle plate and the top plate are arranged in parallel from bottom to top; the support rod is provided with two groups, one group is vertically fixed between the insulating bottom plate and the insulating middle plate, and the other group is vertically fixed between the insulating middle plate and the top plate; the central positions of the insulating bottom plate, the insulating middle plate and the top plate are all provided with avoidance holes for installing the pole.

2. The single-phase insulation structure main switch according to claim 1, characterized in that: The pole comprises an isolating static contact, a vacuum interrupter, a flexible connection and an insulating pull rod; the isolating static contact, the vacuum interrupter, the flexible connection and the insulating pull rod are fixedly connected end to end from bottom to top in sequence; the top end of the insulating pull rod is connected to the circuit breaker transmission structure.

3. The single-phase insulation structure main switch according to claim 1, characterized in that: The lower side of the insulating bottom plate is connected to the first insulating support side plate through an insulating fixing plate, and the first insulating support side plate is fixedly connected to the side wall of the cabinet.

4. The single-phase insulation structure main switch according to claim 1, characterized in that: The top plate is fixedly connected to the side wall of the cabinet.

5. The single-phase insulation structure main switch according to claim 1, characterized in that: Each support rod set is provided with four support rods and arranged in a rectangular shape.

6. The single-phase insulation structure main switch according to claim 1, characterized in that: The circuit breaker transmission structure includes a circuit breaker transmission shaft, an eccentric transmission member and a connecting rod structure; the circuit breaker transmission shaft is rotatably connected to the top plate through a fixed bracket, and the circuit breaker transmission shaft is connected to the circuit breaker operating device through the connecting rod structure; the eccentric transmission member is fixedly arranged on the circuit breaker transmission shaft, and an arc-shaped transmission hole is provided on the eccentric transmission member, and the distances from both ends of the arc-shaped transmission hole to the axis of the circuit breaker transmission shaft are unequal; the top end of the insulating pull rod of the pole can be movably connected to the arc-shaped transmission hole.

7. The single-phase insulation structure main switch according to any one of claims 1 to 6, characterized in that: The isolating switch includes an isolating knife switch, a knife switch mounting structure and an isolating transmission structure; the knife switch mounting structure includes a second insulating support side plate, an insulator and a mounting seat, the second insulating support side plate is fixedly arranged in the cabinet; the insulator is fixedly arranged on the second insulating support side plate; the mounting seat is fixedly arranged on the insulator; one end of the isolating knife switch is hinged on the mounting seat.

8. The single-phase insulation structure main switch according to claim 7, characterized in that: The isolation transmission structure includes an isolation transmission shaft and a swing assembly, wherein the isolation transmission shaft is rotatably connected in the cabinet and is connected to the isolation power mechanism; the swing assembly includes a first swing arm and a second swing arm, wherein one end of the first swing arm is fixedly connected to the isolation transmission shaft, and both ends of the second swing arm are respectively hinged to the other end of the first swing arm and the isolation knife switch.

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